A statistically significant relation was found between the NO3--N concentration of the shallow groundwater under intensively farmed arable fields in the northern Netherlands and the surplus of N (N supply minus N removal via crops), groundwater level
|Title of host publication||Nitrates Agriculture Water International Symposium|
|Place of Publication||Paris La Defense|
|Publication status||Published - 1990|
van Erp, P. J., Boumans, L. M. J., Kloet, C. J., Oenema, O., & van Duijvenbooden, W. (1990). Relation between N input and nitrate concentration of groundwater on arable farms. In R. Calvet (Ed.), Nitrates Agriculture Water International Symposium (pp. 367-373). Paris La Defense: INRA.